Love the game but i do think there could be more balancing on these weapons:
Gau-678 rotary cannon - Needs slightly more firepower and ammo max, maybe increased penetration on fleshy targets since its literally just Gau-32C vulcan but worse
DP7 thermal projector - Less range, higher spread and either slightly less ammo consumption or more ammo max
K5-2 Scattergun - Higher fire rate and less damage since its supposed to be anti aircraft (on that note make aircraft have less health and more speed and non guided missile type weapons have a chance to miss it entirely)
Electromagnetic railgun - Add a sort of charge time and the more time it charges the more damage and penetration it gets, charge it too long and it explodes in your face
And make the landsword sprite change when using different weapons, e.x. a huge solid barrel when using the Electromagnetic railgun